Despite booking/paying ahead to get the £2,00 discount, when i tried to leave the car park, the machine asked me for another £27. I then had to reverse from the barrier - awkward and dangerous, get out of my car and find someone to help. One guy was dreadfu, another very good. However, this hassle and delay (15/20 mins) is nit something I wanted after a very long day which had other stresses. i did wonder what the point of booking/paying ahead was - the extra stress and time wasted for me was not worth the £2 saving. Mr Michael McLoughlin: email - mcloughlin__michael@hotmail.co.uk